I am running that pan too but taking into consideration that your motor is at a tilt in your boat and each boat is a little different coping mine would not be the answer:idea:
In my opinion you do not need all 10quarts in that pan as you will rob some HP as the crank sloshes around in it. I run about 8 quarts and have not had any problems. I do remember that on the dyno with that pan I had some oil psi problems because I had 10 quarts in it to start out and we then drained about 1-2 out and the problem went away